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Finding the Fourth Proportional to 269,390.20, 404,046.90 and 91,905.40

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Solution

The fourth proportional to 269,390.20, 404,046.90 and 91,905.40 is: 137,845.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    269,390.20 : 404,046.90 = 91,905.40 : x
  2. Step 2: Convert to fraction form
    269,390.20/404,046.90 = 91,905.40/x
  3. Step 3: Cross multiply
    269,390.20x = 404,046.90 × 91,905.40
  4. Step 4: Simplify right side
    269,390.20x = 37,134,091,963.26
  5. Step 5: Solve for x
    x = 37,134,091,963.26/269,390.20
  6. Step 6: Final answer
    x = 137,845.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.